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Date: Tue, 19 Aug 2014 17:44:12 +0800
To: Derick Rethans <derick@php.net>
Cc: Aaron Lewis <the.warl0ck.1989@gmail.com>, PHP Internals
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Subject: =?utf-8?Q?=E5=9B=9E=E5=A4=8D=EF=BC=9A_?=[PHP-DEV]
 =?utf-8?Q?=E5=9B=9E=E5=A4=8D=EF=BC=9A_?=[PHP-DEV] How should I call a
 PHP function
From: zxcvdavid@gmail.com (Wei Dai)

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> On Tue, 19 Aug 2014, Wei Dai wrote:
> =20
> > > On Mon, 18 Aug 2014, Wei Dai wrote:
> > > =20
> > > > > I'm trying to call a function inside a module, a PHP=5F=46UNCTI=
ON.
> > > > > Other than zend=5Feval=5Fstringl, what's the direct way to do i=
t=3F
> > > > > =20
> > > > =20
> > > > Please refer to call=5Fuser=5Ffunction and call=5Fuser=5Ffunction=
=5Fex.
> > > > =20
> > > =20
> > > =20
> > > Actually, you need to be careful with this. If you are calling =20
> > > another PHP function in the same extension, do *not* use =20
> > > call=5Fuser=5Ffunction. Instead, create a common C function that yo=
u =20
> > > can call from whereever you need to. call=5Fuser=5Ffunction(=5Fex) =
is not =20
> > > fast.
> > > =20
> > > =20
> > =20
> > i agree. =20
> > =20
> > here is a scenario:
> > =20
> > i was wrote an extension, and i need to call some PHP function like =20
> > =E2=80=9Cstrtr (http://lxr.php.net/s=3Fdefs=3Dstrtr&project=3DPHP=5F5=
=5F4)=E2=80=9D =E2=80=9C*trim=22 or =20
> > a function in another extension but it doesn=E2=80=99t have a common =
C =20
> > function. However, i don=E2=80=99t want to copy the implement code in=
to my =20
> > extension.
> > =20
> > so, i have two options:
> > =20
> > 1. copy the duplicate code into my extension, It can be fast in this =
=20
> > way, but the code is not beautiful.
> > =20
> > 2. call call=5Fuser=5Ffunction(=5Fex) , it=E2=80=99s slower than the =
first option, =20
> > but the code is more simple and beautiful than the first option.
> > =20
> =20
> =20
> or:
> =20
> 3. refactor the functionality in PHP so that trim or others *can* be =20
> used in extensions.
> =20
> I would not pick option 2, especially not if you're going to call this =
=20
> function a lot. Calling a PHP function directly involves a lot more =20
> overhead than just calling a C-function. =20
> =20
you are right.
the reason to write php extension, because we can get performance improve=
ment.

cheer,
Wei Dai

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